# ct mark set numgen inc mod 2
[
    {
        "mangle": {
            "key": {
                "ct": {
                    "key": "mark"
                }
            },
            "value": {
                "numgen": {
                    "mod": 2,
                    "mode": "inc"
                }
            }
        }
    }
]

# ct mark set numgen inc mod 2 offset 100
[
    {
        "mangle": {
            "key": {
                "ct": {
                    "key": "mark"
                }
            },
            "value": {
                "numgen": {
                    "mod": 2,
                    "mode": "inc",
                    "offset": 100
                }
            }
        }
    }
]

# dnat to numgen inc mod 2 map { 0 : 192.168.10.100, 1 : 192.168.20.200 }
[
    {
        "dnat": {
            "addr": {
                "map": {
                    "key": {
                        "numgen": {
                            "mod": 2,
                            "mode": "inc"
                        }
                    },
                    "data": {
                        "set": [
                            [
                                0,
                                "192.168.10.100"
                            ],
                            [
                                1,
                                "192.168.20.200"
                            ]
                        ]
                    }
                }
            }
        }
    }
]

# dnat to numgen inc mod 10 map { 0-5 : 192.168.10.100, 6-9 : 192.168.20.200}
[
    {
        "dnat": {
            "addr": {
                "map": {
                    "key": {
                        "numgen": {
                            "mod": 10,
                            "mode": "inc"
                        }
                    },
                    "data": {
                        "set": [
                            [
                                { "range": [ 0, 5 ] },
                                "192.168.10.100"
                            ],
                            [
                                { "range": [ 6, 9 ] },
                                "192.168.20.200"
                            ]
                        ]
                    }
                }
            }
        }
    }
]